Locks



y 1965 H. WOLTER 3,182,473

LOCKS Filed Feb. 18, 1963 3 Sheets-Sheet l I 77 INVENTOR 4" 350; hem.

H. WOLTER May 11, 1965 LOCKS Filed Feb. 18, 1963 3 Sheets-Sheet 2 INVENTOR. $2 422.

United States Patent 3,182,473 LOCKS Heinz Wolter, Cologne-Lindenthal, Germany, assignor to Firma Josef Voss KG, Bruhl, Bezirk Cologne, Germany, a corporation of Germany Filed Feb. 18, 1963, Ser. No. 258,989 Claims priority, application Germany, Nov. 10, 1962, V 14,542; Nov. 24, 1962, V 14,579 5 Claims. (Cl. 79-449) The present invention relates to a deadlock in which the latch can be operated either by latch handles or by a double-cylinder lock, operation by the latch handles being excluded by the cylinder lock.

The known deadlocks of this kind take the form of a box-like lock casing which can be inserted in a doorframe and which has a turned-up part receiving a spring-biased latch, so that the head thereof emerges at the turned-up part. The latch dovetail is formed with recesses engageable either by the profile of an independent double cylinder lock which extends transversely through the lock casing or by an arm of a latch guide coupled to the door latch handle. Operation is selective, but by means of the cylinder lock the latch can be closed by one further operation, so that the latch spring engages. In this position no recess is provided for the latch guide arm and so the door cannot be opened by the latch handle. To withdraw the latch, the cylinder lock must be operated by means of the correct key. In this construction the boxlike lock casing takes up considerable space. It is very diflicult to fit known locks of this kind in hollow metal section frames for glass doors or the like, since the section members usually used are of reduced size and there is, therefore, inadequate space to fit the lock easing. Another disadvantage is that much of the section members must be removed to make room for the lock casing, and so the strength of the frames is reduced considerably.

It is, therefore, one object of the present invention to provide a deadlock which comprises a one-piece fittable lock which is narrow and low and which is of very compact shape, so that it can readily and simply be introduced into a relatively small matching aperture in the walls of a hollow metal section member.

It is another object of the present invention to provide a deadlock, wherein the double cylinder system, the latch handles and the latch guide are mounted in a common lock casing introducible lengthwise into a matching aperture in a hollow section member of a door frame, and the latch includes a dovetail of a length corresponding to the lock casing width and a head part securable to the dovetail.

It is yet another object of the present invention to provide a deadlock which has the advantage that a narrow and low lock casing is obtained, since all the components forming part of the lock are works-assembled and lead to a reliable deadlock of compact construction which can readily and simply be introduced into a matching aperture and secured, no complicated assembly is required. Also, no wear occurs because of assembly, and a single latch can be used, which is secured by a keeper and which when in the normal position has a spring-loaded movement; the securing of the lock in the door is then ensured by the latch which extends from the section member.

It is still another object of the present invention to provide a deadlock wherein a connection of the latch with the latch handle can take place such, that the dovetail is engageable by a double-armed lever which is rotatably mounted in the lock casing, the same being formed into a head, the free lever arm of the double-armed lever being in or out of engagement with a latch guide mounted in such head, in dependence upon the position of the latch.

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It is also another object of the present invention to provide a deadlock which ensures a reliable securing of the closed position, by providing a ledge on the spring-loaded latch dovetail, which ledge is formed with recesses for the eccentric pins of the cylinder barrels and which bears a keeper urged by the eccentric pins of the barrels, the keeper projection extending on both sides towards a keeper nosepiece of the cylinder casing.

It is a further object of the present invention to provide a deadlock, wherein such ledge has two cheeks between which the spring-loaded keeper rocker, which has a T- shaped claw head, is mounted.

It is yet another object of the present invention to provide a deadlock, which permits the use, as a result of a reliable and simple construction of the keeper, of the known double-cylinder locks with a single closing profile.

It is still a further object of the present invention to provide a deadlock, wherein the dovetail of the latch is equipped only with a center check, which has a recess for a cylindrical closing profile, whereby the ledge is surrounded by a resiliently mounted keeper plate, the lateral end projections of which extend in front of and behind noses provided on the casing.

It is also another object of the present invention to provide a deadlock, which makes it possible to use a double-cylinder lock of conventional structure with a dovetail exchangeably connectable by means of a robust coupling member. This helps to economize the manufacture, to improve reliability of closure and to increase the ability to withstand disturbances and wear; in particular, a strong keeper plate, which is simple to produce, is provided, and the keeper detents are formed in a durable and space-saving manner by nosepieces disposed on the casing.

It is yet a further object of the present invention to provide a deadlock, wherein, in order to favor the liftingout of the keeper, the frame arms of the keeper plate are curved inwards at the place of the closing recess in the central ledge, and the cylinder closing profile extends substantially over thewidth of the frame.

It is now also an object of the present invention to provide a deadlock, wherein, to provide the known feature of direct operation of the latch by means of a latch guide arm and thus overcome in a very simple fashion the difficulty in operation arising out of change of direction, in the proposed lock casing the double cylinder and the latch are mounted above the latch guide with its arm, and the latch dovetail is formed with an extra recess in order that the latch guide arm may move freely, when the latch is in the closed position. Consequently, the latch guide arm itself can engage in the latch and move the same directly. The direction in which the latch moves, such direction depending upon the function of the latch, arises out of the reversal of the constructional shape, i.e., out of the cylinder lock being disposed at the top of the lock casing and out of the latch handles being disposed at the bottom thereof, while the latch which is disposed between these two actuating elements is also mounted above the latch guide. Consequently, the two actuating elements (latch guide and cylinder) can engage advantageously each from an opposite side, and a simple, disturbance-free and wear-free construction is provided.

It is yet a further object of the present invention to provide a deadlock, wherein, to ensure that operation by the latch handles is excluded in the closed position reached by the initial closure of the latch, the extra recess, which is of a length at least corresponding to the limited angle of rotation of the latch guide, is disposed behind the aperture in the latch which is engageable by the latch guide arm.

ans-2,473

Q With these and other objects-inview, which'will become apparent in the following detailed description, the present invention will be clearly understood in connection her to show how the lock is fitted;

FIG. 4 is a longitudinal section along the lines 4- -4 of FIG. 3; FIG. is a cross-section taken along the lines 5 5 of FIG. 2;

FIG. 6 .is across-section similar to that of FIG. 5 andv disclosing the changing lever action;

FIG. '7 is a fragmentary cross-section, corresponding to that of FIG. 5, disclosing the .action of the keeper rocker;

FIG. 8 is a cross-section, similar to that of FIG. 5,

disclosing the latch in its closed position;

FIGS. 9a, 9b, 9c and 9d are schematic views of the lock disclosing different positions during the closing of the lock; r

FIG; 10 isa longitudinal section through the lock, disclosing a different embodiment of the keeper for the latch; 1

FIG. 11 is a cross-section taken along the lines 1111 of FIG. 10;

FIG. 12 is a section taken along the lines 121% of FIGlk-and 7 FIG. '13 is a perspective top view of the latch dovetail and the keeper plate, shown separately.

Referring now to the drawings, and in particularv to FIGS. 1 to 8, a lock casing 1 contains two escutcheons 2,

3 between which is a recess Storming a bed for a latch '4 extending transversely through the lock casing 1 and by means of which two cylinder barrels 6 and 7 are mounted coaxially relative to each other. by a cap 8. At the top the lock casing l is formed as a head 9 in whicha latch guide 11 (FIG. 4) is disposed in a bore .10 parallel with the barrels 6 and 7. Also disposed in the head 9 of the lo'ck casing 1 are bearings 12 for ends .13; of latch handles 15 which are connected to the latch. guide 11 by a latch mandrel 14.

As is diagrammatically illustrated in FIG. 3, the lock casing 1 is slid lengthwise (after removal of the latch end 4 and of one latch handle 15) into an aperture .16 of matching shape in a hollow metal section member 16' of a door or the like; the latch dovetail 4", which is of a length corresponding to the width of the lock casing 1, is dnawn back flush with the, casing by means ofa corresponding operation of the'key. The lock casing It is then secured in position by means of a transverse screw 17, whereafter the latch end 4" and the latch handle 15 are refitted.

The equipment of the lock is as follows:

The recess 5 is bridged Thelatch 4 comprises two parts, namely the latch end 4"and the latch dovetail 4" (FIG. 5), which are rigidly connected to one another by a screw 18; the latch 4 is preferably of square cross-section and is slidingly guided by the surfaces of the recess 5. The latch 4 is urged outw-a'rds by a compression spring 20 which bears against a pin '19 and which ismounted in a groove of the latch dovetail 4". The operative movement of the bolt 4 is limited by the, head 21, which projects beyond the latch contour, of one screw each provided on the end faces of the dovetail 4, such screws cooperating with stop surfaces (FIGS. 2 and 6) in the lock casing 1.

The dovetail 4", biased by the spring 20, bears a ledge 23 which is formed with'recesses M for closing pins 25.;

disposed on the barrels 6 and ,7 and which bears a keep er rocker 26 urged by the plosing pins 25; The keeper rocker 26 has a projection 27 which bears against a keeper nosepiece '28 disposed on the wall 29 of the cap 8.

' The keeperrOcker-ZS is mountedby means of a transverse pin 26. between theledgeschecks 2,3'and is urged into its engaged position: by a resilient pusher 3t (FIGS. 5 7, 8). The free endo'fthe keeper rocker 26*has a T-shaped claw head 31; a

As will be apparent from FIG. 4,-the edge of the ledge 23 extends only substantially as far as the height of the closing ins 25,. so that the samedo not impede the latch 4, when the barrels 6 and 7 are in the normal position.

Engaging in the dovetail 4" is a double-armed bent lever 32,- which ,is so mounted in the casinghead 9, as

to be rotatable around a pin 33. The free arm 34 of the bent lever is cranked andxsobent that its wideendsurface is usually near a stop surface 35 .of thelatch guide 11.. At its other, and bent end,the lever 32 has an entraining pin 36 which engages in an entraining slot 37 in the lock casing 1. The latch guide llis, therefore, re-

siliently rotatable.

The operation of the locks just described willbe'apparent from FIGS/ 6, 7, 8, 941,912, 9cand. 9d and will be described hereinafter. a

FIGS. 9a, 9b, 9c and 9d contain a series of views showing how the lockis operated by the key, while FIG. 6 shows how the latch is operated by'one of the latch handleslS. v

When either of the two barrels 6 or 7 is rotated by the key 15' in the direction indicatedby an arrow in FIG. 9a, the closing pin 25 of the cylinder which is thus rotated first engages in the recess of the claw :headSl-ofthe keeper rocker 26, lifts the keeper out and draws the latch 4 back from its locking position. After the barrel 6 or 7 has rotated through one complete revolutionQthe pin 25 is disposed above the end of the'recess 24. Upon .a further revolution of the cylinder barrelti or,:7,f the 'pin 25 enters the recess 24 andpulls the latch 4 further back until the stop screw 21 thereof abuts the stop 22' of'the lock casing 1.

The latch 4 is pushed forward by-the spring 2t? from this withdrawn position. Thelatch 4' can move on its own from this normal position when, for instance, the diagonal part of. the latch 4 strikes thestriker plate, since the-nosepiece 28. does not inhibit rearward movement of the latch 4. i

When either of the cylinder barrels a or 7 is rotated.

in the opposite direction, the pin 25 0f whichever barrel is operated first liftsthe keeper rocker 26 out (FIG. 7), and then knocks against the breast of the ledge 23, so that the latch 4 is moved out. The keeperprojection 27 then engages behind the nosepiece .28, so thatthe latch 4 is locked in itsclosed position.

When the latch handle 15 is operated with the latch 4 in this position (FIG. 8), thedouble-armed bent lever 32 is pivoted'out so far that the stop surface .35 of the latch guide '11 cannot actupon the free top end 34 of the lever arm, and so the latch handle 15 is in operative.

However, when the latch 4 is looked back into its normal position (FIG. 5), the lever end 34 moves into'the pathof the latch guide stop' surface 35. As will be ap parent from FIG. 6, when the latch handle 15 is operated, the latchguide 11 moves the lever 32 by pivoting the same outwards around its pivot 33.. Through the agenby of the pin 36 in the I groove 37, the lever 32 entrains the latch 4 and, therefore, pulls the latch end 4' completely back. The'latch 4 and the. latch handle .15 are spring 38, respectively.

Referring now again to the drawings, and in particular to FIGS. -13, an embodiment is disclosed, in which the latch dovetail 4 has a central ledge 23 formed with a recess 40 for the cylinder toe 41. Disposed around the ledge 23 is a resiliently mounted keeper plate 42 having at one end lateral projections 43 which engage before and behind nosepieces 44 disposed on the lock casing 1. The frame arms 42, of the plate 42 are curved upwards, into the plane of the top surfaces of the ledge 23, at the place of the recess 40. Mounted in the latch dovetail 4" is a centrally disposed helical spring 52 hearing against a crosspiece 59 which thrusts against the frame arms 42 and presses the keeper plate 42 against stop pins 51 projecting on both sides of the central ledge 23 at both ends. The cylinder toe 41, which is mounted by means of its hub 45 on the ends of the barrels 6 and 7, is of a width such as to move onto the two arms and as to be engageable in the recess 49. The cylinder toe 41, i.e., its hub 45, is connected by a crosspin 47 to a one-piece coupling element 46. The same, when operated by the point 48 of the key 155:, can be so engaged with either of the barrels 6 or 7 as to rotate solidly therewith, through the agency of coupling claws 49 and 49.

The just described embodiment of the deadlock operates as follows:

The latch 4 can be operated either by the latch handles by way of the latch guide 11 and of the transmission arm 32 or by way of either of the double-cylinder barrels 6 or 7, when the latch 4 is in the normal position, as illustrated in FIG. 4. In this position, for instance, if the door closes or if the latch handles 15 are operated, the latch end 4 together with the dovetail 4 moves away in the direction indicated by an arrow x (FIG. 11). Through the agency of the barrels 6 and 7 and of the cylinder toe 41 rotated thereby, the latch 4 can be moved in the direction indicated by an arrow y. Upon such rotation occurring, the cylinder toe 41 engages in the recess 40 and simultaneously shifts the keeper plate 42 against the force of the spring 52 retaining it against the pins 51, so that the keeper is lifted out. The lateral projections 43, therefore, move away from the nosepieces 44 so that the latch 4 is free to move. Arranging the projections 43 at one end of the keeper plate 42 provides the unidirectional free motion of the latch 4 necessary for a latch action.

While I have disclosed several embodiments of the present invention, it is to be understood that these embodiments are given by example only and not in a limiting sense, the scope of the present invention being determined by the objects and the claims.

I claim:

1. A deadlock comprising a lock casing,

a latch reciprocating in said lock casing,

a double-cylinder lock, latch handles and a latch guide mounted in said lock casing and operatively con nected with said latch,

means operating said latch selectively by said latch handles and said double-cylinder lock,

means for excluding operation of said latch handles by said cylinder lock,

said lock casing being adapted to be introducible lengthwise into a matching aperture of a hollow section of a door frame, and

said latch comprising a dovetail portion corresponding to the width of said lock casing, said latch operating means comprising a double-armed lever rotatably mounted in said lock casing and engageable with said dovetail portion, said lock casing including a head portion, a latch guide mounted in said head portion, and the free arm of said double-armed lever being in and out of engagement with said latch guide, respectively, depending upon the position of said latch.

2. The deadlock as set forth in claim 1, wherein said dovetail portion is spring-loaded,

a ledge having recesses borne by said dovetail portion,

cylinder barrels received in said recesses of said ledge,

a keeper borne by said ledge,

a cylinder bolt urged by said keeper,

said casings having a nosepiece, and

said keeper being associated with a projection engaging on both sides said nosepiece of said casing,

3. The deadlock, as set forth in claim 2, which includes a spring-loaded keeper rocker having a T-shaped claw head, and wherein said ledge has two cheeks spaced apart from each other,

and

said spring-loaded keeper rocker is mounted between said cheeks of said ledge.

4. The deadlock, as set forth in claim 3, wherein said dovetail portion has a central ledge having a recess,

said recess being adapted to receive a cylinder toe,

a resiliently mounted keeper plate having lateral end projections,

said central ledge cheek being surrounded by said keeper plate, and

said lateral end projections are disposed before and behind said nosepiece.

5. The deadlock, as set forth in claim 4, wherein said keeper plate has frame arms, the latter being curved upwardly into the plane of the top surfaces of said ledge, and

a cylinder toe received by said recess in said central ledge and extending substantially over a width so as to move onto said frame arms.

References Cited by the Examiner UNITED STATES PATENTS M. HENSON WOOD, JR., Primary Examiner. 

1. A DEADLOCK COMPRISING A LOCK CASING, A LATCH RECIPROCATING IN SAID LOCK CASING, A DOUBLE-CYLINDER LOCK, LATCH HANDLES AND A LATCH GUIDE MOUNTED IN SAID LOCK CASING SAID OPERATIVELY CONNECTED WITH SAID LATCH, MEANS OPERATING SAID LATCH SELECTIVELY BY SAID LATCH HANDLES AND SAID DOUBLE-CYLINDER LOCK, MEANS FOR EXCLUDING OPERATION OF SAID LATCH HANDLES BY SAID CYLINDER LOCK, SAID LOCK CASING BEING ADAPTED TO BE INTRODUCIBLE LENGTHWISE INTO A MATCHING APERTURE OF A HOLLOW SECTION OF A DOOR FRAME, AND SAID LATCH COMPRISING A DOVETAIL PORTION CORRESPONDING TO THE WIDTH OF SAID LOCK CASING, SAID LATCH OPERATING MEANS COMPRISING A DOUBLE-ARMED LEVER ROTATABLY MOUNTED IN SAID LOCK CASING AND ENGAGEABLE WITH SAID DOVETAIL PORTION, SAID LOCK CASING INCLUDING A HEAD PORTION, A LATCH GUIDE MOUNTED IN SAID HEAD PORTION, AND THE FREE ARM OF SAID DOUBLE-ARMED LEVER BEING IN AND OUT OF ENGAGEMENT WITH SAID LATCH GUIDE, RESPECTIVELY, DEPENDING UPON THE POSITION OF SAID LATCH. 